JPS59126124A - Disc brake device - Google Patents

Abstract

PURPOSE:To sufficiently improve and ensure the performance, such as rigidity, of a disc and to effectively reduce creation of a brake noise, by a method wherein a hollow part is formed in a disc, and small ribs are located between the adjoining ribs of the odd number of large ribs which extend from the center to the outer periphery. CONSTITUTION:A disc plate 6, having hollow parts 6c extending through from the central side to the outer periphery side, is partitioned by a plurality of spiral ribs 6d..., 6e... extending from the center to the outer periphery. When, for example, 5 large ribs 6d are located at equal intervals, distribution of rigidity change in the direction of periphery of the plate 6 is as shown by 5, vibration mode of the specified even-numbered node is offset by distribution of an odd- numbered rigidity change during braking, and a specified noise level can be reliably reduced. Further, small ribs 6e reinforce strength between the large ribs 6d to hold the overall strength of the plate 6 large and simultaneously increase a radiating area, resulting in an increase in the cooling efficiency of the plate 6, and in improvement of the performance of a brake.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disc brake device installed in a vehicle, and in particular, to measures for reducing soregi noise.

In general, a disc play 1 device installed in a vehicle includes a disc-shaped disc play 1 that is integrally connected to a wheel and has friction surfaces on both sides, and is opposed to the disc play 1 on both sides of the disc. A pair of brake pads are disposed on the vehicle body side and are pressed toward both friction surfaces by hydraulic cylinders, and the rotation of the wheel is controlled by the frictional resistance between each brake pad and each friction surface of the disc plate. It's a difficult thing to stop.

By the way, in this type of disc brake device,
-i- Since the isk plate is disc-shaped, there is a problem in that it produces a unique brake noise during braking. In other words, as a disc-shaped disk plate rotates, an even number of parts spaced at equal pitches in the circumferential direction become nodes, and adjacent parts of each node are oriented in opposite directions. It vibrates in multiple so-called even part vibration modes, which form an antinode that moves to . Therefore,
When this disc plate 1~ which rotates and overturns while vibrating is restrained by a brake pad in order to control it, as the restraint force increases, a specific even number determined by the size ratio of the brake pad to the disc plate among the plurality of even part vibration modes is generated. Only the partial vibration mode remains, and this causes the J brake noise. For example, the size ratio of the brake pad to the disc plate is usually 1.
/6, and in this case, when the brake pad is restrained, the disc plate vibrates in the 6-node vibration mode, producing a unique brake noise of "key!" around 20'OO'l-1z, which is audibly harsh. cover

In order to solve this problem, a disc plate 1, such as a ventilated disc plate, has a plurality of heat dissipating hollow parts extending radially from a medium heat toward the outer periphery.
In ~ J3, the ribs that partition the hollow part may be arranged at random pitches in the circumferential direction, but although the noise level can be reduced physically,
It is a sufficient countermeasure against the specific frequency of vibration that is a problem.
! 1 was missing.

Therefore, as disclosed in, for example, Japanese Utility Model Application Publication No. 51-65186, in a disk plate having a heat dissipating hollow part as described above, an odd number of ribs partitioning the F2 hollow part are arranged at equal pitch intervals. By setting the rigidity change in the circumferential direction of the disc plate to an odd distribution, this cancels out a specific even-numbered vibration mode that occurs during braking, and thus prevents the occurrence of brake noise with a specific frequency. It is possible to reliably prevent this.

However, in that case, an odd number of ribs are simply arranged at equal pitches in the circumferential direction of the disc plate 1-, so when the number of ribs is small, such as 3 or 5, there are gaps between each rib. There is a risk that the rigidity at the brake pad will decrease and the strength against the brake pad's tightening force during braking will be insufficient. Further, problems arise in that only the walls of the cavity vibrate (so-called 1), causing new brake noise, and furthermore, the cooling efficiency decreases due to a reduction in the heat dissipation area, which adversely affects brake performance.

In view of these points, the present invention has been developed in disc plays 1 to 1 in which an odd number of ribs are arranged at equal pitch intervals in the circumferential direction as described above.
The purpose of this invention is to effectively reduce the brake noise of the disc brake device while ensuring sufficient improvements in various performances such as the rigidity of the disc brake device.

In order to achieve this object, the 4M structure of the present invention includes a disc-shaped disc plate 1- with friction surfaces on both sides, and a pair of disc plates each pressed against both friction surfaces of the disc plate. A disc brake device is provided with a brake pad, and the disc plate 1- is provided with a plurality of ribs extending toward the outer periphery of the medium-sized shell so as to form a hollow part inside. The ribs consist of an odd number of thick ribs arranged at equal pitches in the circumferential direction, and thin ribs arranged between each rib.Thus, the above ≠ 11 large ribs. This makes the rigidity change in the circumferential direction of the disc plate an odd number distribution and eliminates the vibration of the even node mode of the disc plate during braking. The walls of the building were reinforced and covered.

Hereinafter, the present invention will be described in detail based on embodiments not shown in the drawings.

FIG. 1 shows the overall configuration of a disc brake device according to a first embodiment of the present invention, in which 1 is an axle supported by the body of a vehicle, and the axle 1 has a shaft 2. A wheel hub 3 is rotatably supported on the wheel hub 2. A wheel 4 into which a tie V (not shown) is fitted is attached to the wheel hub 3 by a wheel nut 1-5. At the same time, a display plate roller having friction surfaces 6a and 6b on both sides is integrally fixed.

On the other hand, a bracket 7 is integrally fixed to the axle 1, and a caliper 8' is supported on the bracket 7 so as to be slidable in a direction orthogonal to the disc plate 6.

A brake cylinder 9 is formed inside the caliper 8 and extends in a direction perpendicular to the disc plates 1-6. A piston 10 is slidably inserted into the brake cylinder 9, and a hydraulic chamber 11 formed by the piston 10 and the cylinder is connected to a brake for supplying pressure oil through a communication hole 12 formed in the caliper 8. It communicates with a vibrator (not shown). The caliper 8 has a distal end portion that extends around the outside of the vehicle body of the disc plate 6, and a brake pad 13 is disposed at the distal end portion. On the other hand, 1]
The brake pad 14 is located between the outer surface of the piston 10 (the surface opposite to the hydraulic chamber 11) and the inner friction surface OI of the disc plate 6. The brake pad 14 is supported by the caliper 8 so as to be slidable in a direction perpendicular to the disc plates 1-6. and,
A pair of brake pads 13.1! I is spring (
Disk play 1 respectively by the spring force of (not shown)
The friction surface (3a, 5b) of the cylinder 9 is spaced apart from the friction surface (3a, 5b), and in order to introduce oil into the hydraulic chamber 11 of the cylinder 9, the piston 10 is moved to the left in the figure. By moving the brake pads 13 and 14 in the same direction and sliding them facing each other, the brake pads 13 and 14 are applied to both friction surfaces of the disc plates 1-6, respectively, against the spring force (=J). 3a and 6b, and the frictional resistance thereof brakes the disc plate C15 and the wheels integrated with the disc plate 6 (wheel hub 3, wheel 4, and tire). is a parking lever, which mechanically slides the piston 10 via an adjuster spindle 16 in the cylinder 9 to move each brake pad 13° 14 onto the friction surfaces 6a, 6 of the disc plate 6.
b is pressed against the wheel to stop and hold the wheel.

Further, the disk plate 6 is shown in FIGS. 2 and 3.
As shown in the figure, the hollow portions 6G, 6C, .
, 5c, . . . are a plurality of spiral ribs 5+1, 6d extending from the center of the disk plate 6 toward the outer periphery.
, ---a>J: and 5e, 5e, --- are partitioned and formed. Then, the ribs 6d, 6(
1.

... and 6e, 6e, ... are five thick ribs 6d, 5d, ... arranged at equal pitches in the circumferential direction of the disc plate 6, and the respective ribs 6d, 6d.
Three thin ribs 6e, 6e, . .
It consists of...

Therefore, in the embodiment described above, five thick ribs 6d, 6(1, . Disc plate 6 q)
The rigidity change distribution in the circumferential direction is 5. Therefore, when the brake pads 13.1/1 are brought into pressure contact with the friction surfaces 5a, (31) of the rotating disc plates 1-6 to restrain the disc plate 6 during braking, the disc plates 1-0 The disc plate 1-6 and brake pad 13
．． Trying to vibrate in a specific even-numbered node vibration J mode (for example, 6 ml vibration and 1 mode) determined by the size ratio of 1/l, C.
The vibration IJ of the even-numbered vibration mode is given by the odd-numbered stiffness change distribution in the circumferential direction of the disk play 1-6.
This suppresses the vibration of the disk play L-6 in a specific even-numbered vibration mode. the result,
It is possible to reliably reduce the noise level of specific brake noise that causes problems during braking.

In addition, since the thin ribs 5e, 5e, . . . are arranged between the ribs 6d, 6 (1) of the disc plays 1 to 6, each person's ribs 5e, 5e, .
Hollow portions 6G, 6c, . . . between ribs 6d, (36)
The walls of the disc plate 6 are reinforced to maintain the overall strength of the disc plate 6, thereby improving the reliability of the brake system. Further, the hollow portions 5c, 6'c.

Since the wall is reinforced, the wall itself does not undergo so-called membrane vibration, and new brake noise can be prevented from occurring. Moreover, the thin ribs 6e, 6e,...
Thick ribs 6d, hollow parts 6c, 5c between 6d
, . . . , the cooling efficiency of the disc plate 6 increases, and the brake performance can be improved.

In the above embodiment, as shown in FIG. 3, the number of thin ribs 6c, 5e, . Although the pitch is approximately equal, the number of thin ribs may be increased or decreased to 4 or more or 2 or less, and the arrangement may be changed to a random pitch.

Further, in the above embodiment, the number of fattening parts d provided in the disc play 1-6 is five, but as shown in FIG. 4, it is also possible to have seven. In this case, since the rigidity change distribution in the circumferential direction of the disk plate 6 is 7, the specific even-numbered vibration seventh chord that can be damped changes upward to reduce the noise level of the higher frequency plagier noise. It becomes possible to do things.

Figure 5 Oni and Figure 6 are the 2nd lost M! I show an example J. Furthermore, the second
There is one in the same part as FIG. J5 and FIG.

That is, in the first embodiment, the hollow parts 6G, 6C, . . .
1-6 from the center side to the outer peripheral side, and as the disk plate 6 rotates, air flows into the hollow portion 5c.

Disc play 1 by circulating within 6c,...
In this embodiment, a so-called ventilated disk plate 6 is used which can enhance the cooling effect of the holes 6'c and 6'c.

1. Using a disc plate 6' that is closed at the center and open only to the outer circumference. The disc plate 6' has five thick ribs 5' d and 5' d arranged at equal pitches in the circumferential direction.

. . . and two thin ribs 6te', 61 arranged at approximately equal pitch between the respective ribs 6'd, 6'd.
E and C are provided. Therefore, also in this case, the same effects as in the first embodiment can be achieved.

As explained above, according to the present invention, in the disc brake device in which brake pads are brought into pressure contact with the friction surfaces on both sides of the disc plate i~, respectively, the brake pads are brought into pressure contact with the friction surfaces of the disc plate i~. A plurality of ribs are provided to extend in the direction to form a hollow part, and the ribs are composed of an odd number of thick ribs arranged at equal pitches in the circumferential direction and thin ribs arranged between each of the ribs. As a result, the thin ribs increase the bullet holes in the wall between the thick ribs, ensuring rigidity and cooling performance in the disc plate.

At the same time, the thick ribs make the rigidity changes in the circumferential direction of the disc plate odd-numbered, which eliminates the vibration caused by the even-numbered vibration mode of the disc plate during braking, which adversely affects the braking performance of the disc brake 'A C1. It would be possible to significantly reduce the noise level of illegal plagiarism noise and prevent vehicle noise pollution.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1A and FIG. 4 show the first embodiment, and FIG.
Fig. 2 is a partially cutaway side view of the disc plate 1-, Fig. 3 is a sectional view taken along line m-nt in Fig. 2, Fig. 4 is a view equivalent to Fig. 3 showing a modification of the disc plate, and Fig. 5. 6 shows a second embodiment, FIG. 15 is a longitudinal sectional view of the disk plate, and FIG. 6 is a sectional view taken along the line Vl--Vl in FIG. 5. 6.6'... Disc plate, 6a, (3L+...
・Friction surface, 6G, 6'C...Hollow part, 6d, 6
' d... Thick rib, 68.6' e... Thin rib, 8
... Caliper, 9... Lu-kiji ring, 10...
Screws 1 to 13, 14...Brake pad. Ward 1 4

Claims (1)

[Claims] (1) Disc-shaped disc play 1 with friction surfaces on both sides
・And both 1 of the disc plate? A disc brake device is provided with a pair of tele-1 pads that are each pressed toward the center of the disc plate, and the disc plate is provided with a pair of tele-1 pads that extend from the center toward the outer periphery so as to form a hollow part inside the disc plate. A plurality of extending ribs are provided, and the ribs consist of an odd number of thick ribs arranged at equal pitches in the circumferential direction and thin ribs arranged between each of the ribs 7. '3 i
Disc brake device with 'f&.